feat(scope): make Belgium and North Sea operational default

docs/KNOWN_LIMITATIONS.md

@@ -15,9 +15,12 @@ runtime source of truth.
 - Buildings, population, terrain, imagery, nature, agriculture, soil and flood
   themes may report `partial`, `not_configured` or `unsupported` outside the
   materialized source partitions. The UI and exports retain that state.
-- Belgian North Sea planning/reporting boundaries are materialized. Continuous
-  authoritative bathymetry acquisition remains `not_configured`; VHA profile
-  observations are not presented as a seabed model or water volume.
+- Belgian North Sea planning/reporting boundaries are materialized. Bounded
+  strict-TLS MDK WCS acquisition is implemented but stays disabled until the
+  operator enables `MDK_BATHYMETRY_ACQUISITION_ENABLED` with a coverage id that
+  the live readiness probe advertises. Until then the theme reports
+  `not_configured`; VHA profile observations are not presented as a seabed
+  model or water volume.
 - Official endpoints can be temporarily unavailable. Bounded acquisition fails
   closed and never substitutes fixture or fabricated production data.
 
@@ -47,8 +50,11 @@ runtime source of truth.
   trained general model for all Belgian objects or themes.
 - PyTorch and Ultralytics are present only in the AI image. No model weights
   auto-download. A missing local model reports unavailable.
-- Real segmentation models remain placeholders; fixture segmentation is
-  explicit-only. No SAM or YOLO-seg dependency is installed.
+- Local YOLO-seg and SAM segmentation are implemented through the ultralytics
+  interface but stay `not_configured` until the operator points
+  `YOLO_SEG_MODEL_PATH`/`SAM_MODEL_PATH` to existing local weights and enables
+  them explicitly. GeoIntel never downloads segmentation weights automatically;
+  fixture segmentation remains explicit-only.
 
 ## Operations